Tail portion of a ski



FIG. 1 is a top, side perspective view of a tail portion of a ski; and,

FIG. 2 is a top view of the tail portion of the ski of FIG. 1.

The ornamental design that is claimed is shown in solid lines in the drawings.

The broken lines in the drawing are for illustrative purposes only and form no part of the claimed design. 

We claim the ornamental design for a tail portion of a ski, as shown and described. 